CN105629020B - A kind of resistance-capacitance differential pressure type Current Voltage combination transformer - Google Patents
A kind of resistance-capacitance differential pressure type Current Voltage combination transformer Download PDFInfo
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- CN105629020B CN105629020B CN201510886329.7A CN201510886329A CN105629020B CN 105629020 B CN105629020 B CN 105629020B CN 201510886329 A CN201510886329 A CN 201510886329A CN 105629020 B CN105629020 B CN 105629020B
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- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 229910018503 SF6 Inorganic materials 0.000 description 3
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 3
- 229960000909 sulfur hexafluoride Drugs 0.000 description 3
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- 229920006351 engineering plastic Polymers 0.000 description 2
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- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
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- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The present invention relates to a kind of resistance-capacitance differential pressure type Current Voltage combination transformers, including the high-field electrode that axis vertically extends, low-field electrode are provided on the inside of high-field electrode, the grounding electrode being coaxially set with high-field electrode is provided on the inside of low-field electrode.Coaxial line is arranged from the inside to the outside for grounding electrode, low-field electrode and high-field electrode, is conducive to product with compact structure, while also helping the distribution of electric field.
Description
Technical field
The present invention relates to a kind of resistance-capacitance differential pressure type Current Voltage combination transformers.
Background technique
It is not yet mature in view of optical profile type voltage transformer technology, in intelligent substation process of construction, generally use electromagnetism
Formula voltage transformer is powered on the mode of sub- conversion module, and required digital quantity signal is provided for intelligent substation.Resistance-capacitance differential pressure type
Voltage transformer is a major class mostly important in electromagnetic potential transformer, and common resistance-capacitance differential pressure type voltage transformer has folded
Fill condenser type and coaxial capacitance formula, resistance-capacitance differential pressure type voltage transformer has that energy consumption is small, is conducive to power system reactive power balance
Characteristic, while coaxial-type resistance-capacitance differential pressure type voltage transformer uses sulfur hexafluoride gas as internal major insulation medium, has exhausted
The advantages of edge high reliablity, stable accuracy.
Existing resistance-capacitance differential pressure type voltage transformer is " a kind of based on capacitance-resistance point as disclosed in Chinese patent CN201853571U
Press the voltage transformer of principle ", including pressure vessel is provided with high-field electrode in pressure vessel, is provided on the inside of high-field electrode
Low-field electrode, high-field electrode and low-field electrode form capacitor, are additionally provided on pressure vessel vertical with high-field electrode, low-field electrode
The grounding electrode of setting is provided with the pin configuration for being connected with corresponding resistor on low-field electrode.In use, in low-field electrode
Coupling resistance on route between grounding electrode.Existing this resistance-capacitance differential pressure type voltage transformer has problems in that:
Grounding electrode is vertically arranged with high-field electrode, low-field electrode, causes entire product structure not compact enough, field distribution is also not too
It is good；It can only realize that single-sensor exports, be unfavorable for the stability of the measurement data of measurement.
Summary of the invention
The purpose of the present invention is to provide a kind of compact-sized resistance-capacitance differential pressure type Current Voltage combination transformers.
To solve the above-mentioned problems, the technical solution of the present invention is as follows:
A kind of resistance-capacitance differential pressure type Current Voltage combination transformer is high including the high-field electrode that axis vertically extends
It is provided with low-field electrode on the inside of piezoelectricity pole, the ground connection electricity being coaxially set with high-field electrode is provided on the inside of low-field electrode
Pole.
Low-field electrode has at least two, and each low-field electrode coaxial line arrangement, one of low-field electrode and the ground connection are electric
Extremely it is connected, the pin configuration for being connected with corresponding resistor is provided on remaining low-field electrode.
Low-field electrode is the tile like structure being coaxially set with grounding electrode, circumferential direction of each low-field electrode along grounding electrode
Arranged for interval.
Low-field electrode is the tubular construction being coaxially set with grounding electrode, and each low-field electrode is spaced sets along the vertical direction
It sets.
Be provided with the suspension electrode being coaxially set with high-field electrode between high-field electrode and low-field electrode, suspension electrode with
High-field electrode, low-field electrode Insulation Coordination.
Suspension electrode is cooperated by the insulating gas between suspension electrode and high-field electrode with high voltage electrode insulation, and suspend electricity
Pole is by realizing that the insulating sleeve of suspension electrode and low-field electrode Insulation Coordination is set on low-field electrode.
The interior table of the low-field electrode is exposed.
The invention has the benefit that coaxial line is arranged from the inside to the outside for grounding electrode, low-field electrode and high-field electrode, favorably
In product with compact structure, while also helping the distribution of electric field.
Further, the low-field electrode of coaxial structure has multiple, and each low-field electrode can flexibly realize single channel, the multichannel progress of disease
Output；One of low-field electrode is directly grounded, and can eliminate influence of the transient state high pressure to route where other low-field electrodes.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of the present of invention；
Fig. 2 is the arrangement schematic diagram of Fig. 1 mesohigh electrode, low-field electrode and grounding electrode；
Fig. 3 is the low-voltage capacitance structure chart in the present invention；
Fig. 4 is electrical schematic diagram of the invention.
Specific embodiment
The embodiment of resistance-capacitance differential pressure type Current Voltage combination transformer is as shown in figures 1-4: including pressure vessel 12, pressure
The upper end of container 12 is provided with container end 1, is sequentially and coaxially provided with high-field electrode 2 in pressure vessel from outside to inside, suspends
The interior table of electrode 3, low-field electrode and grounding electrode 8, low-field electrode is exposed, and current transformer 11 is provided in container end, hangs
Floating electrode is that low-field electrode provides mechanical support, and grounding electrode is solid bar structure (or hollow barrel structure), high-field electrode 2 with hang
Floating electrode 3 realizes insulation by the insulating gas between the two, and the insulating gas in the present embodiment is sulfur hexafluoride gas.It is low
There are three piezoelectricity poles, and three low-field electrodes are respectively the first low-field electrode 7, the second low-field electrode 9 and third low-field electrode 6, and three
A low-field electrode coaxial line arrangement, low-field electrode are the tile like structure being coaxially set with grounding electrode, low-field electrode it is interior
Circumferential surface is exposed, circumferentially-spaced arrangement of each low-field electrode along grounding electrode, gap and low-field electrode between adjacent low-field electrode
It is insulated by insulating gas between grounding electrode, insulating gas 5 is sulfur hexafluoride gas.Suspension electrode 3 is outstanding by realizing
Floating electrode 3 and the insulating sleeve 4 of low-field electrode Insulation Coordination are set on low-field electrode.Have between low-field electrode and grounding electrode
Insulation fabric part support.First low-field electrode 7 is directly connected with grounding electrode, be provided on other two low-field electrode for
The connected pin configuration of corresponding resistor is output electrode, and just for secondary output signal, ground connection is electric for the pin configuration on low-field electrode
It is negative that secondary output signal just corresponding with secondary output signal is provided on extremely.Fig. 1 middle term 10 indicates mutual inductor supporting leg.
The low-field electrode of multiple coaxial configurations forms divider with suspension electrode respectively, realizes voltage transformer multi output,
More defencive functions.Suspension electrode is made of floating potential cylinder with the metal layer for being attached at floating potential cylinder inner circumferential, floating potential cylinder
It is fixed on pressure vessel, is connected between floating potential cylinder and pressure vessel using engineering plastics, engineering plastics have high intensity
With height insulation shape, insulating sleeve is made of high tenacity, high insulating property insulating materials.Pressure vessel made of metal forms outer
Electric field shielding system, floating potential cylinder form strong and weak electric field shielding harness, surface capacitance of the floating potential cylinder close to high-field electrode
Effect undertakes Primary Conductor to pressure vessel ground potential pressure drop major part, and metal layer, low-field electrode is cooperateed with to form capacitance partial pressure
Device.The build-out resistor on corresponding low-field electrode, adjusts mutual inductor output port output voltage, is formed simultaneously Overvoltage suppressing electricity
Road.
Circuit model is extracted as, and the capacitance parameter between high-field electrode and floating potential cylinder is C1, capacitance values determine
Due to the concrete shape of the dielectric constant of gas medium and high-field electrode and floating potential cylinder between high-field electrode and floating potential cylinder,
Floating potential cylinder is close to metal layer, and the capacitance parameter between metal layer and each low-field electrode is C2、C2、C3, can idealize and be considered as nothing
Limit for length's coaxial capacitance calculation formula are as follows:
In formula: εoThe dielectric constant of relative vacuum；εrDielectric constant；L capacitance plate length；The coaxial paraxial side metal layer half of a
Diameter；The coaxial distal shaft side metal layer radius of b.
There is following expression according to electrical schematic diagram (Fig. 4):
C in formula2、C3The capacitance parameter between the first metal layer and the every piecemeal of second metal layer, output valve areMatching electricity
Resistance R can be asked.
In order to realize the multi output of current transformer, the Rogowski coil of respective numbers, each Rogowski coil point can be configured
It Xing Cheng not current sensor interface.Rogowski coil is installed in aluminum or other metal shells, and shell, which is threaded through, once leads
On body.
In other embodiments of the invention: the number of low-field electrode can also be two, four or other numbers；Certainly
Low-field electrode can also be the tubular construction that axis vertically extends, and each low-field electrode is spaced sets along the vertical direction at this time
It sets.
Claims (5)
1. a kind of resistance-capacitance differential pressure type Current Voltage combination transformer, including the high-field electrode that axis vertically extends, high pressure
Low-field electrode is provided on the inside of electrode, it is characterised in that: be provided on the inside of low-field electrode and be coaxially set with high-field electrode
Grounding electrode；The suspension electrode being coaxially set with high-field electrode is provided between high-field electrode and low-field electrode, suspend electricity
Pole and high-field electrode, low-field electrode Insulation Coordination；
Low-field electrode has at least two, and each low-field electrode coaxial line is arranged, one of low-field electrode and the grounding electrode phase
Even, the pin configuration for being connected with corresponding resistor is provided on remaining low-field electrode.
2. resistance-capacitance differential pressure type Current Voltage combination transformer according to claim 1, it is characterised in that: low-field electrode be with
The tile like structure that grounding electrode is coaxially set, circumferentially-spaced arrangement of each low-field electrode along grounding electrode.
3. resistance-capacitance differential pressure type Current Voltage combination transformer according to claim 1, it is characterised in that: low-field electrode be with
The tubular construction that grounding electrode is coaxially set, each low-field electrode are spaced setting along the vertical direction.
4. resistance-capacitance differential pressure type Current Voltage combination transformer according to claim 1, it is characterised in that: suspension electrode passes through
Insulating gas between suspension electrode and high-field electrode and high voltage electrode insulation cooperate, suspension electrode by realize suspension electrode with
The insulating sleeve of low-field electrode Insulation Coordination is set on low-field electrode.
5. resistance-capacitance differential pressure type Current Voltage combination transformer described in any one according to claim 1~4, it is characterised in that:
The interior table of the low-field electrode is exposed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510886329.7A CN105629020B (en) | 2015-12-04 | 2015-12-04 | A kind of resistance-capacitance differential pressure type Current Voltage combination transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510886329.7A CN105629020B (en) | 2015-12-04 | 2015-12-04 | A kind of resistance-capacitance differential pressure type Current Voltage combination transformer |
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| Publication Number | Publication Date |
|---|---|
| CN105629020A CN105629020A (en) | 2016-06-01 |
| CN105629020B true CN105629020B (en) | 2019-01-18 |
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| CN201510886329.7A Expired - Fee Related CN105629020B (en) | 2015-12-04 | 2015-12-04 | A kind of resistance-capacitance differential pressure type Current Voltage combination transformer |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3712190A1 (en) * | 1987-04-10 | 1988-10-27 | Bbc Brown Boveri & Cie | Electrical transformer |
| JP2004170172A (en) * | 2002-11-19 | 2004-06-17 | Hokkei Industries Co Ltd | Electric field and magnetic field sensor |
| CN102005289B (en) * | 2010-10-22 | 2011-12-14 | 北京浩霆光电技术有限责任公司 | Resistor-capacitor voltage division principle-based voltage transformer |
| CN202916328U (en) * | 2012-09-28 | 2013-05-01 | 北京科锐配电自动化股份有限公司 | Current/voltage integrated-type measuring device |
| CN203218099U (en) * | 2013-03-21 | 2013-09-25 | 许继集团有限公司 | Strut type gas-insulating electronic current-voltage combined transformer |
| CN103762066A (en) * | 2014-01-02 | 2014-04-30 | 国家电网公司 | Multi-output electronic current and voltage combined transformer for GIS (geographic information system) |
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2015
- 2015-12-04 CN CN201510886329.7A patent/CN105629020B/en not_active Expired - Fee Related
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Effective date of registration: 20170809 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: Xuji Group Co., Ltd. Applicant after: Electric Power Research Institute of State Grid Shandong Electric Power Company Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: Xuji Group Co., Ltd. |
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